Implement User-based API Keys (#981)

* added column ApiKey to dbo.User

* added dbo.User.ApiKey to User_Update

* added dbo.User.ApiKey to User_Create

* wrote migration script for implementing dbo.User.ApiKey

* Added ApiKey prop to the User table model

* Created AccountsController method for getting a user's API Key

* Created AccountsController method for rotating a user API key

* Added support to ApiClient for passed-through ClientSecrets when the request comes from the cli

* Added a new conditional to ClientStore to account for user API keys

* Wrote unit tests for new user API Key methods

* Added a refresh of dbo.UserView to new migration script for ApiKey

* Let client_credentials grants into the custom token logic

* Cleanup for ApiKey auth in the CLI feature

* Created user API key on registration

* Removed uneeded code for user API keys

* Changed a .Contains() to a .StartsWith() in ClientStore

* Changed index that an array is searched on

* Added more claims to the user apikey clients

* Moved some claim finding logic to a helper method

src/Core/Services/IUserService.cs

@@ -69,5 +69,6 @@ namespace Bit.Core.Services
         Task<bool> TwoFactorProviderIsEnabledAsync(TwoFactorProviderType provider, ITwoFactorProvidersUser user);
         Task<string> GenerateEnterprisePortalSignInTokenAsync(User user);
         Task<string> GenerateSignInTokenAsync(User user, string purpose);
+        Task RotateApiKeyAsync(User user);
     }
 }