Getting error when I try signup

[mwanaJumuiya]

Below is the error

\app\models\authentic.model.
js:42
return next(err);
^

ReferenceError: next is not defined
at \app\models\authentic
.model.js:42:21
at \node_modules\bcrypt
bcrypt.js:140:13
at process._tickCallback (internal/process/next_tick.js:61:11)
[nodemon] app crashed - waiting for file changes bef

[yug95]

have you created database schema ? and this error comes when you some exception please follow my read me file and try debugging