I'm getting this error when tring to activate gmail API in my project from https://console.cloud.google.com/apis/api/gmail-json.googleapis.com/overview :
Spanner encountered a persistent error: generic::RESOURCE_EXHAUSTED: Quota exceeded: chubby!mdb/apiserving-spanner in alloc cloud_flex:us_global over user limit for [FLASH_SPACE].
What should I do to fix that ? (My final goal is to update user email signature for my domain)
