access any Zoho CRM access data having only 1 API KEY

access any Zoho CRM access data having only 1 API KEY

Hi, is it possible to access ANY Zoho CRM account data via Zoho CRM API having only:
a) one API key
b) login and password of Zoho CRM account that I'm trying to get data from

I'm just trying to understand possibility to perform above said in my specific scenario:  I have several friends that can provide me with their Zoho CRM account credentials (login/password), but will not give me their accounts' API keys. 
Can I use my own api key (may I can request this "universal" api key via    https://zapi.zoho.com/apigen.do ? ) to access Zoho CRM api and fetch my friend's data lets say calling getRecords api method call ?

thanks, 

Alex