bad post request, code: 'ER_BAD_NULL_ERROR', errno: 1048, sqlMessage: "Column 'user_name'...

I have a problem with posting data to Api and sending it to the database, the values are sent NULL to the >database. here is the code i used: component typescript component html api node.js


I tested the Api on postman and its working good also tried the front end part to make Http Request and >send data to firebase and its working too, but when I connected both of them I get this error.
​

Continue reading...