To login to the MT5 account, you will need to create an MT5 Account from the client portal dashboard:
Login to your client portal via: https://portal.fxpesa.com/ and on the accounts section on your dashboard, Click on ''CREATE ACCOUNT'' as highlighted on the screenshot below:
Then proceed to select the platform type, which is MetaTrader 5 as indicated on the red arrow on the screenshot below:
Finally, login into your MT5 trading platform using your new login credentials