Implement login resolver (#15)

* add sign_up_method to users table

* add session store

* implement login resolver

server/enum/signUpMethod.go

@@ -3,7 +3,7 @@ package enum
 type SignupMethod int
 
 const (
-	Basic SignupMethod = iota
+	BasicAuth SignupMethod = iota
 	MagicLink
 	Google
 	Github
@@ -12,8 +12,8 @@ const (
 
 func (d SignupMethod) String() string {
 	return [...]string{
-		"basic",
-		"magiclink",
+		"basic_auth",
+		"magic_link",
 		"google",
 		"github",
 		"facebook",

server/enum/tokenType.go

@@ -0,0 +1,15 @@
+package enum
+
+type TokenType int
+
+const (
+	RefreshToken TokenType = iota
+	AccessToken
+)
+
+func (d TokenType) String() string {
+	return [...]string{
+		"refresh_token",
+		"access_token",
+	}[d]
+}