FcmClient usage best practices?

[SuddenGunter]

• Is FcmClient thread-safe?
• Can I share 1 static instance between several threads and send messages with it?
• Should I dispose it after each sent message?
• Will FcmClient renew auth token for FCM API if it will expire?

[bytefish]

• Yes.
• Yes.
• No.
• No.