vagrant@master:~$ vault write mongodb/roles/create db_name="connection" roles='[ "readWrite", { "role": "read", "db": "admin" } ]'
Success! Data written to: mongodb/roles/create
vagrant@master:~$ vault read mongodb/creds/create
Error reading mongodb/creds/create: Error making API request.

URL: GET http://127.0.0.1:8200/v1/mongodb/creds/create
Code: 500. Errors:

* 1 error occurred:

* empty creation statements


# With creation_statements


vagrant@master:~$ vault write mongodb/roles/create db_name="connection" roles='[ "readWrite", { "role": "read", "db": "admin" } ]' creation_statements="db.createUser( \
  { \
    roles: [ { role: "read", db: "admin" } ] \
  } \
)
"
Success! Data written to: mongodb/roles/create
vagrant@master:~$ vault read mongodb/roles/create
Key                      Value
---                      -----
creation_statements      [db.createUser(   {     roles: [ { role: read, db: admin } ]   } )]
db_name                  connection
default_ttl              0
max_ttl                  0
renew_statements         <nil>
revocation_statements    <nil>
rollback_statements      <nil>
vagrant@master:~$ vault read mongodb/creds/create
Error reading mongodb/creds/create: Error making API request.

URL: GET http://127.0.0.1:8200/v1/mongodb/creds/create
Code: 500. Errors:

* 1 error occurred:

* invalid character 'd' looking for beginning of value
vagrant@master:~$