Handle promise rejection

[Nizar7zak]

shoestore/server/database/build/build.js

Line 9 in b9c46b5

return connection.query(sql);

If you have an error in this Promise, you will see this message " UnhandledPromiseRejection" which means you are dealing with async code, that promise is rejected but you don't handle the Rejection.
I suppose you forget add.catchhere, and you should do it to know where is the error happened