How to calling Get method of Sq-lite?

Question

Hello everyone,

I have one method in Repository class i want to call that from my registration class

method is-->

public async Task<T> Get(Expression<Func<T, bool>> predicate)

{

return await _db.FindAsync<T>(predicate);

}

how can i call that one. i'm trying like that

 {

Repository<Registration> repo = new Repository<Registration>();

Registration Entity_Reg = new Registration();

string query = "select * from registration where fname=" + txtUame.Text + "and Password=" + txtPass.Text + "";

var result = repo.Get(query,____);

} 

it is  showing error.

please tell me how to call this method in proper way.