Add resolver to update profile

Resolves #12 #11

server/enum/verification.go

@@ -0,0 +1,15 @@
+package enum
+
+type VerificationType int
+
+const (
+	BasicAuthSignup VerificationType = iota
+	UpdateEmail
+)
+
+func (d VerificationType) String() string {
+	return [...]string{
+		"basic_auth_signup",
+		"update_email",
+	}[d]
+}