List email bans

curl --request POST \
  --url https://api.fluxer.app/v1/admin/bans/email/list \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '{
  "limit": 250
}'

{
  "bans": [
    "jsmith@example.com"
  ]
}