Overide default ckan emailer
env to set
CKANEXT__MOEIEMAILER__CLIENT_ID=ffff-fff
CKANEXT__MOEIEMAILER__CLIENT_SECRET=ff-ffff-fff
CKANEXT__MOEIEMAILER__TENANT_ID=ff-fff-ff
CKANEXT__MOEIEMAILER__MAIL_FROM=ff-fff-fff
To ensure the mailer is overide, make moeimailer the first plugin
ckan.plugin = moeiemailer