oauth flows missing

When adding oauth2 flows via the ui they seem to be missing in the yaml: 
```
  securitySchemes:
    petstore_auth:
      type: oauth2
```

Copy pasted the mermade output to the swagger editor and it prints the error
```
Structural error at components.securitySchemes.petstore_auth
should have required property 'flows'
missingProperty: flows
```