Lacks of testing

[zoedsoupe]

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Describe the problem

The library doesn't have any test, no unit or integration tests.

Describe the improvement

We need to implement automated tests, i know that all of the "features" of this library depends on a their party api (supabase services per si) but we can use ex_vcr or even just mock the http request just to confirm that the expected results of each functions are working as desired.

Additional context

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