Save user tokens as varchar(450) and not text to fix mysql indexing issues

pkg/user/token.go

@@ -41,7 +41,7 @@ const (
 type Token struct {
 	ID      int64     `xorm:"bigint autoincr not null unique pk"`
 	UserID  int64     `xorm:"not null"`
-	Token   string    `xorm:"TEXT not null index"`
+	Token   string    `xorm:"varchar(450) not null index"`
 	Kind    TokenKind `xorm:"not null"`
 	Created time.Time `xorm:"created not null"`
 }