Добавил миграции в индексацию.

PhoneStore/Migrations/20220721214239_AddIdentityUserWithRoles.Designer.cs

+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using PhoneStore.Models;
+
+namespace PhoneStore.Migrations
+{
+    [DbContext(typeof(MobileContext))]
+    [Migration("20220721214239_AddIdentityUserWithRoles")]
+    partial class AddIdentityUserWithRoles
+    {
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("Relational:MaxIdentifierLength", 63)
+                .HasAnnotation("ProductVersion", "5.0.17")
+                .HasAnnotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn);
+
+            modelBuilder.Entity("PhoneStore.Models.Basket", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasAnnotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn);
+
+                    b.Property<int>("PhoneId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PhoneId");
+
+                    b.ToTable("Baskets");
+                });
+
+            modelBuilder.Entity("PhoneStore.Models.Brand", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasAnnotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn);
+
+                    b.Property<string>("Name")
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Brands");
+                });
+
+            modelBuilder.Entity("PhoneStore.Models.Order", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasAnnotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn);
+
+                    b.Property<string>("Address")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ContactPhone")
+                        .HasColumnType("text");
+
+                    b.Property<int>("PhoneId")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("UserName")
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PhoneId");
+
+                    b.ToTable("Orders");
+                });
+
+            modelBuilder.Entity("PhoneStore.Models.Phone", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasAnnotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn);
+
+                    b.Property<int?>("BrandId")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("Image")
+                        .HasColumnType("text");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("text");
+
+                    b.Property<decimal>("Price")
+                        .HasColumnType("numeric");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("BrandId");
+
+                    b.ToTable("Phones");
+                });
+
+            modelBuilder.Entity("PhoneStore.Models.User", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasAnnotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn);
+
+                    b.Property<int>("AccessFailedCount")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("Age")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("ConcurrencyStamp")
+                        .HasColumnType("text");
+
+                    b.Property<string>("Email")
+                        .HasColumnType("text");
+
+                    b.Property<bool>("EmailConfirmed")
+                        .HasColumnType("boolean");
+
+                    b.Property<bool>("LockoutEnabled")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateTimeOffset?>("LockoutEnd")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("text");
+
+                    b.Property<string>("NormalizedEmail")
+                        .HasColumnType("text");
+
+                    b.Property<string>("NormalizedUserName")
+                        .HasColumnType("text");
+
+                    b.Property<string>("PasswordHash")
+                        .HasColumnType("text");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasColumnType("text");
+
+                    b.Property<bool>("PhoneNumberConfirmed")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("SecurityStamp")
+                        .HasColumnType("text");
+
+                    b.Property<bool>("TwoFactorEnabled")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("UserName")
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("PhoneStore.Models.Basket", b =>
+                {
+                    b.HasOne("PhoneStore.Models.Phone", "Phone")
+                        .WithMany()
+                        .HasForeignKey("PhoneId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Phone");
+                });
+
+            modelBuilder.Entity("PhoneStore.Models.Order", b =>
+                {
+                    b.HasOne("PhoneStore.Models.Phone", "Phone")
+                        .WithMany()
+                        .HasForeignKey("PhoneId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Phone");
+                });
+
+            modelBuilder.Entity("PhoneStore.Models.Phone", b =>
+                {
+                    b.HasOne("PhoneStore.Models.Brand", "Brand")
+                        .WithMany()
+                        .HasForeignKey("BrandId");
+
+                    b.Navigation("Brand");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

PhoneStore/Migrations/20220721214239_AddIdentityUserWithRoles.cs

+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+namespace PhoneStore.Migrations
+{
+    public partial class AddIdentityUserWithRoles : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Users",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    Name = table.Column<string>(type: "text", nullable: true),
+                    Age = table.Column<int>(type: "integer", nullable: false),
+                    UserName = table.Column<string>(type: "text", nullable: true),
+                    NormalizedUserName = table.Column<string>(type: "text", nullable: true),
+                    Email = table.Column<string>(type: "text", nullable: true),
+                    NormalizedEmail = table.Column<string>(type: "text", nullable: true),
+                    EmailConfirmed = table.Column<bool>(type: "boolean", nullable: false),
+                    PasswordHash = table.Column<string>(type: "text", nullable: true),
+                    SecurityStamp = table.Column<string>(type: "text", nullable: true),
+                    ConcurrencyStamp = table.Column<string>(type: "text", nullable: true),
+                    PhoneNumber = table.Column<string>(type: "text", nullable: true),
+                    PhoneNumberConfirmed = table.Column<bool>(type: "boolean", nullable: false),
+                    TwoFactorEnabled = table.Column<bool>(type: "boolean", nullable: false),
+                    LockoutEnd = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: true),
+                    LockoutEnabled = table.Column<bool>(type: "boolean", nullable: false),
+                    AccessFailedCount = table.Column<int>(type: "integer", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Users", x => x.Id);
+                });
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "Users");
+        }
+    }
+}