export async function (req, res) {

    const {email, password} = req.body

    //check if request body contains required data
    if (!email || !password) return res.send({error : "email/password required"})
    const checkedUser = await prisma.user.findUnique({where  : { email : email }})
    .then(async (err, user) => {

      //if callback returns error or undefined as user send error response
      if (err || !user ) return res.json({error : "error loging in"})
     
      //validate password
      const passwordValid = await bcrypt.compare(password, user.password)

      //you can use callback function here also instead of if 
      if (passwordValid) {

         //sign token and send
         const token = await jwt.sign({email, id : user.id , }, process.env.SECRET_TOKEN_KEY)

         res.json({token})
      
      }else {
       res.json({error : "wrong email/password"})
     })

}