We cannot know what the background of the agreement is, but this decision does not mean that the authorities got a backdoor in Telegram and that they will get user data automatically. The right of a country to request such data through court orders is completely legitimate, as is the right of Telegram to reject it if it considers such a request to be unfounded.
I assume that the recent changes in Telegram's rules are a result of the arrest and movement restrictions placed on Pavel Durov. I doubt if he would reject a court judgement from a French court to provide information about a user. He might end up in jail if he does that. Quote
This forum is also fully compliant with the laws, especially those in the US where the servers are located, which means that the forum has cooperated with the authorities several times and provided them with information about certain users, but it can also refuse any request if it deems that there is no legal basis for it.
In the case of Telegram, it is the court that might request this information. Failure to obey court judgment is a serious crime called contempt of court. A court order is binding on all individuals or organizations within its jurisdiction. The option the platform has in such an event is to appeal such judgment in a higher court and get a restraining order. It might end up becoming a legal battle that might eventually get to the Supreme Court. 
