Can I authorize someone to maintain my research data?

In general, researchers are best placed to keep their own profiles up to date. 
If you ask a colleague to maintain your research data for you, never share your credentials!
Instead, you can make your colleague a trusted user:
Click your P-number at the top right corner of Pure → User settings → Scroll down to Trusted user(s) -> Enter a name or p-number of the person -> Save.
This will allow the trusted user to maintain your research data once they have logged on to Pure.