Embodiments provide methods, and computing devices for auto-submission of user authentication credential. A method includes initiating, by a first computing device of a user, a detection of a pre-paired second computing device of the user based at least on an application requiring a credential to be entered. The application is running on the first computing device and the credential is pre-stored in an encrypted form on a companion application running on the second computing device. The method includes generating a communication channel with the second computing device based at least on generating a mutual authentication key by the first and second computing devices. The method includes sending a request to receive the credential to the second computing device. The method includes receiving the credential in the encrypted form. The method includes decrypting the credential. The method includes facilitating the entering of the credential on the application without user intervention.