Restricting and authorizing contacts from zoho crm

I want to authorize a contact from Zoho CRM to Zoho Bookings - like lets say if he/she tries to book a meeting room through Bookings, the system should check for which city is he added as a contact in CRM and should only allow to book for the same and incase any user tries to book a meeting room for another location it should not allow him to do the same. The bookings should also show him some allowed credits for booking the meeting room for a month - if he tries to book beyond the allowed credits the system shows a popup to them mentioning the same.

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