Cannot Log in to my site

Log into cPanel.
Under Databases, click phpMyAdmin.
Click on the WordPress database (if you installed this through QuickInstall, this will be named wrdp#) from the left panel list.
Click wp_users from the left panel list.
Under user_login you will see the list of registered users. Under the user whose password you wish to reset, click edit.
Under the user_pass column, clear the value on the far right and replace with what you would like the password to be.
In the Function drop-down menu, select MD5.
At the bottom of the page, click GO.

Taken from https://support.hostgator.com/articles/how-to-reset-wordpress-password

Take a look at the WordPress docs for checking logins and changing passwords in a number of different ways. Resetting Your Password ? WordPress Codex