Pull-Request: Fix checkpwd and val in eq func in custom dql

Unfortunately same result.


type Query {
    authenticate: [User] @custom(dql: """
	query {
        var(func: type(User)) @filter(eq(User.username, "Alice") OR eq(User.email, "")) {
            check as checkpwd(User.password, "password")
        }
            
        authenticate(func: eq(val(check), 1)) {
            uid
            User.username
            User.email
        }
    }
    """
    )
}

Error:

"errors": [
    {
      "message": "resolving authenticate failed because Dgraph query failed because Dgraph execution failed because while lexing query {\n  var(func: type(User)) @filter((eq(User.username, \"Alice\") OR eq(User.email, \"\"))) {\n    check as User.password)\n  }\n  authenticate(func: eq(check, \"1\")) {\n    uid\n    User.username\n    User.email\n  }\n} at line 3 column 26: Unrecognized character in lexText: U+0029 ')'",
      "locations": [
        {
          "line": 2,
          "column": 3
        }
      ]
    }
  ],