fix(http api): throw validation error if missing property in call to /api/admin/users/123/permissions, #7365

pkg/api/dtos/user.go

@@ -31,7 +31,7 @@ type AdminUpdateUserPasswordForm struct {
 }
 
 type AdminUpdateUserPermissionsForm struct {
-	IsGrafanaAdmin bool `json:"IsGrafanaAdmin"`
+	IsGrafanaAdmin bool `json:"isGrafanaAdmin" binding:"Required"`
 }
 
 type AdminUserListItem struct {