[IMPROVE] DCF Calculations

[Rxann]

What's the feature that should be improved?
I would like the DCF calculations to be run locally instead of using FinancialModelingPrep. I would like it to be this way because it is possible to run it locally and then people without API keys for FinancialModelingPrep can use the feature.

Describe how you would like the feature improved
Run the calculations locally instead of using 3rd party.

Possibly describe the ideal way to improve this
Either add a new feature for locally running the process or changing the current one to not need FinancialModelingPrep/

Additional information