remove bus from login (#44995)

* remove bus from login

* remove comments and format correctly

* remove the downcast

pkg/services/multildap/multidap_mock.go

@@ -0,0 +1,40 @@
+package multildap
+
+import (
+	"github.com/grafana/grafana/pkg/models"
+	"github.com/grafana/grafana/pkg/services/ldap"
+)
+
+type MultiLDAPmock struct {
+	MultiLDAP
+	ID          int64
+	UserCalled  bool
+	LoginCalled bool
+	UserInfo    *models.User
+	AuthModule  string
+	ExpectedErr error
+}
+
+func (m *MultiLDAPmock) Login(query *models.LoginUserQuery) (
+	*models.ExternalUserInfo, error,
+) {
+	m.LoginCalled = true
+	query.User = m.UserInfo
+	query.AuthModule = m.AuthModule
+	result := &models.ExternalUserInfo{
+		UserId: m.ID,
+	}
+	return result, m.ExpectedErr
+}
+
+func (m *MultiLDAPmock) User(login string) (
+	*models.ExternalUserInfo,
+	ldap.ServerConfig,
+	error,
+) {
+	m.UserCalled = true
+	result := &models.ExternalUserInfo{
+		UserId: m.ID,
+	}
+	return result, ldap.ServerConfig{}, nil
+}