A believer should conceal what sins he may commit

Narrated Safwan bin Muhriz: A man asked Ibn `Umar, "What did you hear Allah's Messenger (ﷺ) saying regarding An-Najwa (secret talk between Allah and His believing worshipper on the Day of Judgment)?" He said, "(The Prophet (ﷺ) said), "One of you will come close to his Lord till He will shelter him in His screen and say: Did you commit such-and-such sin? He will say, 'Yes.' Then Allah will say: Did you commit such and such sin? He will say, 'Yes.' So Allah will make him confess (all his sins) and He will say, 'I screened them (your sins) for you in the world, and today I forgive them for you."'