Signing and licensing app for company

Hi, I have to develop an app for a company, which will publish it on Play Store with its account.
I have two questions:

1) what private key I have to use to sign the app with B4A?
I think: I have to compile with debug key, and then the company will do this: http://ift.tt/2bLJenu
It is correct?

2) how can the company add the licensing key of the Play Store? (the company doesn't want to send me its Play Store key)

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