Update sample user admin to user authority, add revoke role to auth

utils/authority.go

@@ -265,6 +265,38 @@ func (a *Authority) RevokeRolePermission(c *core.Context, roleSlug string, permS
 	return nil
 }
 
+// Revokes a user's role
+func (a *Authority) RevokeUserRole(c *core.Context, userID uint, roleSlug string) error {
+	// find the role
+	var role models.Role
+	res := c.GetGorm().Where("slug = ?", roleSlug).First(&role)
+	if res.Error != nil {
+		if errors.Is(res.Error, gorm.ErrRecordNotFound) {
+			return ErrRoleNotFound
+		}
+		return res.Error
+	}
+
+	// revoke the role
+	rRes := c.GetGorm().Where("user_id = ?", userID).Where("role_id = ?", role.ID).Delete(models.UserRole{})
+	if rRes.Error != nil {
+		return rRes.Error
+	}
+
+	return nil
+}
+
+// Revokes all user's role
+func (a *Authority) RevokeAllUserRole(c *core.Context, userID uint) error {
+	// revoke the role
+	rRes := c.GetGorm().Where("user_id = ?", userID).Delete(models.UserRole{})
+	if rRes.Error != nil {
+		return rRes.Error
+	}
+
+	return nil
+}
+
 // Returns all stored roles
 func (a *Authority) GetAllRoles(c *core.Context) ([]models.Role, error) {
 	var roles []models.Role