Actual doc give this error
```
fatal: [localhost]: FAILED! => {
"changed": false,
"failed": true,
"invocation": {
"module_args": {
"command": "facts",
"register": "new_database_facts"
},
"module_name": "rds"
},
"msg": "unsupported parameter for module: register"
}
```
Register should be at the module `rds` level and not at args level in this example :
```
- rds:
command: facts
instance_name: new-database
- register: new_database_facts
+ register: new_database_facts
```
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