diff --git a/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/IdentityUserLoginConsts.cs b/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/IdentityUserLoginConsts.cs
index 4bd670024f..0ef43bb1b1 100644
--- a/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/IdentityUserLoginConsts.cs
+++ b/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/IdentityUserLoginConsts.cs
@@ -3,7 +3,7 @@
     public static class IdentityUserLoginConsts
     {
         public const int MaxLoginProviderLength = 64;
-        public const int MaxProviderKeyLength = 256;
+        public const int MaxProviderKeyLength = 196;
         public const int MaxProviderDisplayNameLength = 128;
     }
 }
diff --git a/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUser.cs b/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUser.cs
index fd61f5c809..256ee9be9f 100644
--- a/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUser.cs
+++ b/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUser.cs
@@ -211,12 +211,11 @@ namespace Volo.Abp.Identity
             Claims.RemoveAll(c => c.ClaimValue == claim.Value && c.ClaimType == claim.Type);
         }
 
-        public void AddLogin([NotNull] IGuidGenerator guidGenerator, [NotNull] UserLoginInfo login)
+        public void AddLogin([NotNull] UserLoginInfo login)
         {
-            Check.NotNull(guidGenerator, nameof(guidGenerator));
             Check.NotNull(login, nameof(login));
 
-            Logins.Add(new IdentityUserLogin(guidGenerator.Create(), Id, login));
+            Logins.Add(new IdentityUserLogin(Id, login));
         }
 
         public void RemoveLogin([NotNull] string loginProvider, [NotNull] string providerKey)
diff --git a/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserLogin.cs b/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserLogin.cs
index 8556fee9d7..609a3b101a 100644
--- a/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserLogin.cs
+++ b/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserLogin.cs
@@ -8,7 +8,7 @@ namespace Volo.Abp.Identity
     /// <summary>
     /// Represents a login and its associated provider for a user.
     /// </summary>
-    public class IdentityUserLogin : Entity<Guid>
+    public class IdentityUserLogin : Entity
     {
         /// <summary>
         /// Gets or sets the of the primary key of the user associated with this login.
@@ -35,20 +35,19 @@ namespace Volo.Abp.Identity
             
         }
 
-        protected internal IdentityUserLogin(Guid id, Guid userId, [NotNull] string loginProvider, [NotNull] string providerKey, string providerDisplayName)
+        protected internal IdentityUserLogin(Guid userId, [NotNull] string loginProvider, [NotNull] string providerKey, string providerDisplayName)
         {
             Check.NotNull(loginProvider, nameof(loginProvider));
             Check.NotNull(providerKey, nameof(providerKey));
 
-            Id = id;
             UserId = userId;
             LoginProvider = loginProvider;
             ProviderKey = providerKey;
             ProviderDisplayName = providerDisplayName;
         }
 
-        public IdentityUserLogin(Guid id, Guid userId, [NotNull] UserLoginInfo login)
-            : this(id, userId, login.LoginProvider, login.ProviderKey, login.ProviderDisplayName)
+        protected internal IdentityUserLogin(Guid userId, [NotNull] UserLoginInfo login)
+            : this(userId, login.LoginProvider, login.ProviderKey, login.ProviderDisplayName)
         {
 
         }
diff --git a/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserStore.cs b/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserStore.cs
index bb3d9c86c5..c56f33eddf 100644
--- a/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserStore.cs
+++ b/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserStore.cs
@@ -504,7 +504,7 @@ namespace Volo.Abp.Identity
 
             await _userRepository.EnsureCollectionLoadedAsync(user, u => u.Logins, cancellationToken);
 
-            user.AddLogin(_guidGenerator, login);
+            user.AddLogin(login);
         }
 
         /// <summary>
diff --git a/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/IdentityDbContextModelBuilderExtensions.cs b/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/IdentityDbContextModelBuilderExtensions.cs
index 736ddcc214..affb8c75f7 100644
--- a/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/IdentityDbContextModelBuilderExtensions.cs
+++ b/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/IdentityDbContextModelBuilderExtensions.cs
@@ -88,11 +88,12 @@ namespace Volo.Abp.Identity.EntityFrameworkCore
             {
                 b.ToTable(tablePrefix + "UserLogins", schema);
 
+                b.HasKey(x => new {x.UserId, x.LoginProvider});
+
                 b.Property(ul => ul.LoginProvider).HasMaxLength(IdentityUserLoginConsts.MaxLoginProviderLength).IsRequired();
                 b.Property(ul => ul.ProviderKey).HasMaxLength(IdentityUserLoginConsts.MaxProviderKeyLength).IsRequired();
                 b.Property(ul => ul.ProviderDisplayName).HasMaxLength(IdentityUserLoginConsts.MaxProviderDisplayNameLength);
 
-                b.HasIndex(l => new { l.UserId, l.LoginProvider, l.ProviderKey });
                 b.HasIndex(l => new { l.LoginProvider, l.ProviderKey });
             });