Please verify the Freshdesk URL. It would go by your_company_name.freshdesk.com. Your Username would be your agent email address and you would have to enter your password.
Also, if you have SSO, you would have to use your SSO credentials accordingly. Also please open your account in the browser and do the following steps:
Type your URL in the address bar, hit enter and select Login. And then choose the option " Are you an Agent? Login here" and it will redirect you to the Freshworks page. Select "Forgot password" option, enter your email address and a password reset link will be sent to your email. Reset the password using the link and you can log in to the account.
If you continue to face any issues with login, please feel free to write to firstname.lastname@example.org and one of our agents would get in contact with you to assist you regarding this.