how to make login authentication in realm sdk

[RAIHANMLN12]

hello everyone, my name is raihan, i'm a beginner in using realm kotlin. I currently developed an android app, so i make sign up and login form. i have a problem with login form.

here's my code:
fun checkUser(email: String, password: String) : Boolean {
val user = Database.realm.query("email", email, "password", password).first().find()
return user!= null
}

when i run the app, the logcat give this error message:
java.lang.IllegalArgumentException: [RLM_ERR_INVALID_QUERY_STRING]: Invalid predicate: 'email': syntax error, unexpected end of file

please help me guys, thank you very much