Initial open source release

internal/domain/user_errors.go

@@ -0,0 +1,12 @@
+package domain
+
+import "errors"
+
+var (
+	ErrUsernameInvalid     = errors.New("username invalid")
+	ErrUsernameOccupied    = errors.New("username occupied")
+	ErrUsernameNotOccupied = errors.New("username not occupied")
+	ErrPhoneNotOccupied    = errors.New("phone not occupied")
+	ErrFirstNameInvalid    = errors.New("first name invalid")
+	ErrAboutTooLong        = errors.New("about too long")
+)