Removes the functionality to save/load serialized user profiles from the Robinhood broker (see rationale)
Updates the README instructions to reflect the changes
Adds a default device token
Rationale:
Current implementation breaks the serialized loading/saving since the load and save methods are static but use this.doNotSaveToDisk which is not available in a static setting
Saving (whether to a database, file or otherwise) should be handled by the implementer not the library
The implementation depends on fs which breaks this library's compatibility with react-native/expo
Changes
Rationale:
loadandsavemethods are static but usethis.doNotSaveToDiskwhich is not available in a static settingfswhich breaks this library's compatibility withreact-native/expo