AuthorizationCodeGranter implements auth.TokenGranter.

ClientCredentialsGranter implements auth.TokenGranter.

PasswordGranter implements auth.TokenGranter.

PermissionBasedGranter is a helper based struct that provide common permission based implementations.

RefreshGranter implements auth.TokenGranter.

SwitchTenantGranter implements auth.TokenGranter.

SwitchUserGranter implements auth.TokenGranter.