This question is of great price for all WordPress users, how to control and manage WordPress admin login, sign in, or reset the password. Most often it happens when anyone does not have a password, or the user has no access to email to proceed for a standard password reset procedure. Sometimes, the recovery mail is correct, still the problem exists because the website does not send mails correctly.
Reset password by mail access:
Go to the login page of WordPress, select lost password link
On next window, put your email address, or user name for wp admin account
After that click get a new password
Doing this, you will receive a link to receive the password.
Reset password without mail access:
If you dont have mail access, you can reset the password in the database through phpMyadmin. This only solution works in case you have no recovery mail, or your existing email id isnt receiving it correctly.