Make the identity module domain service method virtual.

Resolve #1876

modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityRoleManager.cs

@@ -39,7 +39,7 @@ namespace Volo.Abp.Identity
             _cancellationTokenProvider = cancellationTokenProvider;
         }
 
-        public async Task<IdentityRole> GetByIdAsync(Guid id)
+        public virtual async Task<IdentityRole> GetByIdAsync(Guid id)
         {
             var role = await Store.FindByIdAsync(id.ToString(), CancellationToken);
             if (role == null)

modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserManager.cs

@@ -43,7 +43,7 @@ namespace Volo.Abp.Identity
             _cancellationTokenProvider = cancellationTokenProvider;
         }
 
-        public async Task<IdentityUser> GetByIdAsync(Guid id)
+        public virtual async Task<IdentityUser> GetByIdAsync(Guid id)
         {
             var user = await Store.FindByIdAsync(id.ToString(), CancellationToken);
             if (user == null)
@@ -54,7 +54,7 @@ namespace Volo.Abp.Identity
             return user;
         }
 
-        public async Task<IdentityResult> SetRolesAsync([NotNull] IdentityUser user, [NotNull] IEnumerable<string> roleNames)
+        public virtual async Task<IdentityResult> SetRolesAsync([NotNull] IdentityUser user, [NotNull] IEnumerable<string> roleNames)
         {
             Check.NotNull(user, nameof(user));
             Check.NotNull(roleNames, nameof(roleNames));

modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/IdentityUserRepositoryExternalUserLookupServiceProvider.cs

@@ -20,7 +20,7 @@ namespace Volo.Abp.Identity
             _lookupNormalizer = lookupNormalizer;
         }
 
-        public async Task<IUserData> FindByIdAsync(
+        public virtual async Task<IUserData> FindByIdAsync(
             Guid id, 
             CancellationToken cancellationToken = default)
         {
@@ -33,7 +33,7 @@ namespace Volo.Abp.Identity
             )?.ToAbpUserData();
         }
 
-        public async Task<IUserData> FindByUserNameAsync(
+        public virtual async Task<IUserData> FindByUserNameAsync(
             string userName, 
             CancellationToken cancellationToken = default)
         {

modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/UserRoleFinder.cs

@@ -13,7 +13,7 @@ namespace Volo.Abp.Identity
             _identityUserRepository = identityUserRepository;
         }
 
-        public async Task<string[]> GetRolesAsync(Guid userId)
+        public virtual async Task<string[]> GetRolesAsync(Guid userId)
         {
             return (await _identityUserRepository.GetRoleNamesAsync(userId)).ToArray();
         }