Question: How to edit error message of Login form using API rule in JQuerry?

Good day po sa lahat ng mga nag web dev. dito!! patulong nman po kung pano ko "ma eedit yung error message " ng login form ko! using API rule in JQuerry"...

req: 1000,
eml: eml,
pwd: pwd

"pag success Successfully Log
pag fail
Incorrect Password
Incorrect Email Address
Please Input Password
Please Input Email Address "

switch statement po ang alam kung pwedeng gamitin jan pero hindi ko alam kung ano i Construct..

salamat po!!