Auth: Implement requester interface in access control module (#74289)

* Implement requester interface in the access control module

pkg/services/user/identity.go

@@ -46,11 +46,14 @@ func (u *SignedInUser) NameOrFallback() string {
 // TODO: There's a need to remove this struct since it creates a circular dependency
 
 // DEPRECATED: This function uses `UserDisplayDTO` model which we want to remove
+// In order to retrieve the user URL, we need the dto library. However, adding
+// the dto library to the user service creates a circular dependency
 func (u *SignedInUser) ToUserDisplayDTO() *UserDisplayDTO {
 	return &UserDisplayDTO{
 		ID:    u.UserID,
 		Login: u.Login,
 		Name:  u.Name,
+		// AvatarURL: dtos.GetGravatarUrl(u.GetEmail()),
 	}
 }
 
@@ -200,3 +203,8 @@ func (u *SignedInUser) GetEmail() string {
 func (u *SignedInUser) GetDisplayName() string {
 	return u.NameOrFallback()
 }
+
+// DEPRECATEAD: Returns the authentication method used
+func (u *SignedInUser) GetAuthenticatedBy() string {
+	return u.AuthenticatedBy
+}

pkg/services/user/model.go

@@ -5,6 +5,8 @@ import (
 	"fmt"
 	"strings"
 	"time"
+
+	"github.com/grafana/grafana/pkg/services/auth/identity"
 )
 
 type HelpFlags1 uint64
@@ -104,7 +106,7 @@ type SetUsingOrgCommand struct {
 }
 
 type SearchUsersQuery struct {
-	SignedInUser *SignedInUser
+	SignedInUser identity.Requester
 	OrgID        int64 `xorm:"org_id"`
 	Query        string
 	Page         int