@Entity(tableName = "users", indices = @Index(value = "username", unique = true))
public class User {

@NonNull
public String getuId() {
    return uId;
}

public void setuId(@NonNull String uId) {
    this.uId = uId;
}

public String getuUsername() {
    return uUsername;
}

public void setuUsername(String uUsername) {
    this.uUsername = uUsername;
}

@NonNull
public String getuPassword() {
    return uPassword;
}

public void setuPassword(@NonNull String uPassword) {
    this.uPassword = uPassword;
}

public String getuEmail() {
    return uEmail;
}

public void setuEmail(String uEmail) {
    this.uEmail = uEmail;
}

@NonNull
@PrimaryKey
@ColumnInfo(name = "user_id")
private String uId;

@ColumnInfo(name = "username")
private String uUsername;

@NonNull
@ColumnInfo(name = "password")
private String uPassword;

@ColumnInfo(name = "email")
private String uEmail;


@Ignore
public User(String userName, String email, String password){
    uId = UUID.randomUUID().toString();
    uUsername = userName;
    uEmail = email;
    uPassword = password;
}

public User(@NonNull String id, String username, String email,@NonNull String password){
    this.uId = id;
    this.uUsername = username;
    this.uPassword = password;
    this.uEmail = email;
}
}