diff --git a/AAIntegration.SimmonsBank.API/Entities/Account.cs b/AAIntegration.SimmonsBank.API/Entities/Account.cs
index 6035572..cf4bb8b 100644
--- a/AAIntegration.SimmonsBank.API/Entities/Account.cs
+++ b/AAIntegration.SimmonsBank.API/Entities/Account.cs
@@ -8,4 +8,5 @@ public class Account
     public string Name { get; set; }
     public decimal Balance { get; set; }
     public string ExternalAccountNumber { get; set; }
+    public User Owner { get; set; }
 }
\ No newline at end of file
diff --git a/AAIntegration.SimmonsBank.API/Entities/Transaction.cs b/AAIntegration.SimmonsBank.API/Entities/Transaction.cs
index 6737bae..68f527b 100644
--- a/AAIntegration.SimmonsBank.API/Entities/Transaction.cs
+++ b/AAIntegration.SimmonsBank.API/Entities/Transaction.cs
@@ -15,4 +15,5 @@ public class Transaction
     public Account? CreditAccount { get; set; }
     public decimal Amount { get; set; }
     public bool IsPending { get; set; }
+    public User Owner { get; set; }
 }
\ No newline at end of file
diff --git a/AAIntegration.SimmonsBank.API/Migrations/20240320022712_UserOwnedEntities.Designer.cs b/AAIntegration.SimmonsBank.API/Migrations/20240320022712_UserOwnedEntities.Designer.cs
new file mode 100644
index 0000000..2ce4c71
--- /dev/null
+++ b/AAIntegration.SimmonsBank.API/Migrations/20240320022712_UserOwnedEntities.Designer.cs
@@ -0,0 +1,173 @@
+// <auto-generated />
+using System;
+using AAIntegration.SimmonsBank.API.Config;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace AAIntegration.SimmonsBank.API.Migrations
+{
+    [DbContext(typeof(DataContext))]
+    [Migration("20240320022712_UserOwnedEntities")]
+    partial class UserOwnedEntities
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "7.0.9")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("AAIntegration.SimmonsBank.API.Entities.Account", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<decimal>("Balance")
+                        .HasColumnType("numeric");
+
+                    b.Property<string>("ExternalAccountNumber")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("OwnerId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("OwnerId");
+
+                    b.ToTable("Accounts");
+                });
+
+            modelBuilder.Entity("AAIntegration.SimmonsBank.API.Entities.Transaction", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<decimal>("Amount")
+                        .HasColumnType("numeric");
+
+                    b.Property<DateTime>("CreatedOn")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<int?>("CreditAccountId")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<int?>("DebitAccountId")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("Description")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("ExternalId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("IsPending")
+                        .HasColumnType("boolean");
+
+                    b.Property<int>("OwnerId")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("UpdatedOn")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CreditAccountId");
+
+                    b.HasIndex("DebitAccountId");
+
+                    b.HasIndex("OwnerId");
+
+                    b.ToTable("Transactions");
+                });
+
+            modelBuilder.Entity("AAIntegration.SimmonsBank.API.Entities.User", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("ApiKey")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("MFAKey")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("SimmonsBankPassword")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("SimmonsBankUsername")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("AAIntegration.SimmonsBank.API.Entities.Account", b =>
+                {
+                    b.HasOne("AAIntegration.SimmonsBank.API.Entities.User", "Owner")
+                        .WithMany()
+                        .HasForeignKey("OwnerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Owner");
+                });
+
+            modelBuilder.Entity("AAIntegration.SimmonsBank.API.Entities.Transaction", b =>
+                {
+                    b.HasOne("AAIntegration.SimmonsBank.API.Entities.Account", "CreditAccount")
+                        .WithMany()
+                        .HasForeignKey("CreditAccountId");
+
+                    b.HasOne("AAIntegration.SimmonsBank.API.Entities.Account", "DebitAccount")
+                        .WithMany()
+                        .HasForeignKey("DebitAccountId");
+
+                    b.HasOne("AAIntegration.SimmonsBank.API.Entities.User", "Owner")
+                        .WithMany()
+                        .HasForeignKey("OwnerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("CreditAccount");
+
+                    b.Navigation("DebitAccount");
+
+                    b.Navigation("Owner");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/AAIntegration.SimmonsBank.API/Migrations/20240320022712_UserOwnedEntities.cs b/AAIntegration.SimmonsBank.API/Migrations/20240320022712_UserOwnedEntities.cs
new file mode 100644
index 0000000..9e23922
--- /dev/null
+++ b/AAIntegration.SimmonsBank.API/Migrations/20240320022712_UserOwnedEntities.cs
@@ -0,0 +1,82 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace AAIntegration.SimmonsBank.API.Migrations
+{
+    /// <inheritdoc />
+    public partial class UserOwnedEntities : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<int>(
+                name: "OwnerId",
+                table: "Transactions",
+                type: "integer",
+                nullable: false,
+                defaultValue: 0);
+
+            migrationBuilder.AddColumn<int>(
+                name: "OwnerId",
+                table: "Accounts",
+                type: "integer",
+                nullable: false,
+                defaultValue: 0);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Transactions_OwnerId",
+                table: "Transactions",
+                column: "OwnerId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Accounts_OwnerId",
+                table: "Accounts",
+                column: "OwnerId");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Accounts_Users_OwnerId",
+                table: "Accounts",
+                column: "OwnerId",
+                principalTable: "Users",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Transactions_Users_OwnerId",
+                table: "Transactions",
+                column: "OwnerId",
+                principalTable: "Users",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Accounts_Users_OwnerId",
+                table: "Accounts");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Transactions_Users_OwnerId",
+                table: "Transactions");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Transactions_OwnerId",
+                table: "Transactions");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Accounts_OwnerId",
+                table: "Accounts");
+
+            migrationBuilder.DropColumn(
+                name: "OwnerId",
+                table: "Transactions");
+
+            migrationBuilder.DropColumn(
+                name: "OwnerId",
+                table: "Accounts");
+        }
+    }
+}
diff --git a/AAIntegration.SimmonsBank.API/Migrations/DataContextModelSnapshot.cs b/AAIntegration.SimmonsBank.API/Migrations/DataContextModelSnapshot.cs
index a3f869c..cfe2c20 100644
--- a/AAIntegration.SimmonsBank.API/Migrations/DataContextModelSnapshot.cs
+++ b/AAIntegration.SimmonsBank.API/Migrations/DataContextModelSnapshot.cs
@@ -41,8 +41,13 @@ namespace AAIntegration.SimmonsBank.API.Migrations
                         .IsRequired()
                         .HasColumnType("text");
 
+                    b.Property<int>("OwnerId")
+                        .HasColumnType("integer");
+
                     b.HasKey("Id");
 
+                    b.HasIndex("OwnerId");
+
                     b.ToTable("Accounts");
                 });
 
@@ -80,6 +85,9 @@ namespace AAIntegration.SimmonsBank.API.Migrations
                     b.Property<bool>("IsPending")
                         .HasColumnType("boolean");
 
+                    b.Property<int>("OwnerId")
+                        .HasColumnType("integer");
+
                     b.Property<DateTime>("UpdatedOn")
                         .HasColumnType("timestamp with time zone");
 
@@ -89,6 +97,8 @@ namespace AAIntegration.SimmonsBank.API.Migrations
 
                     b.HasIndex("DebitAccountId");
 
+                    b.HasIndex("OwnerId");
+
                     b.ToTable("Transactions");
                 });
 
@@ -121,6 +131,17 @@ namespace AAIntegration.SimmonsBank.API.Migrations
                     b.ToTable("Users");
                 });
 
+            modelBuilder.Entity("AAIntegration.SimmonsBank.API.Entities.Account", b =>
+                {
+                    b.HasOne("AAIntegration.SimmonsBank.API.Entities.User", "Owner")
+                        .WithMany()
+                        .HasForeignKey("OwnerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Owner");
+                });
+
             modelBuilder.Entity("AAIntegration.SimmonsBank.API.Entities.Transaction", b =>
                 {
                     b.HasOne("AAIntegration.SimmonsBank.API.Entities.Account", "CreditAccount")
@@ -131,9 +152,17 @@ namespace AAIntegration.SimmonsBank.API.Migrations
                         .WithMany()
                         .HasForeignKey("DebitAccountId");
 
+                    b.HasOne("AAIntegration.SimmonsBank.API.Entities.User", "Owner")
+                        .WithMany()
+                        .HasForeignKey("OwnerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
                     b.Navigation("CreditAccount");
 
                     b.Navigation("DebitAccount");
+
+                    b.Navigation("Owner");
                 });
 #pragma warning restore 612, 618
         }