Support Email and phone login.

object/check.go

@@ -56,9 +56,9 @@ func CheckUserSignup(organization string, username string, password string, disp
 }
 
 func CheckUserLogin(organization string, username string, password string) (*User, string) {
-	user := GetUserByField(organization, "name", username)
+	user := GetUserByFields(organization, username)
 	if user == nil {
-		return nil, "username does not exist, please sign up first"
+		return nil, "the user does not exist, please sign up first"
 	}
 
 	if user.Password != password {

object/user.go

@@ -146,6 +146,28 @@ func HasUserByField(organizationName string, field string, value string) bool {
 	return GetUserByField(organizationName, field, value) != nil
 }
 
+func GetUserByFields(organization string, field string) *User {
+	// check username
+	user := GetUserByField(organization, "name", field)
+	if user != nil {
+		return user
+	}
+
+	// check email
+	user = GetUserByField(organization, "email", field)
+	if user != nil {
+		return user
+	}
+
+	// check phone
+	user = GetUserByField(organization, "phone", field)
+	if user != nil {
+		return user
+	}
+
+	return nil
+}
+
 func SetUserField(user *User, field string, value string) bool {
 	affected, err := adapter.engine.Table(user).ID(core.PK{user.Owner, user.Name}).Update(map[string]interface{}{field: value})
 	if err != nil {