fixed measurement saving

[bogenpirat]

this fixes #109.

the form for editing/inserting measurements requires a local field authenticity_token to be submitted in the request. the commit in this pull request queries the required value from the edit page's dom and inserts it into the request.

it thereby circumvents the authenticity_token value stored during login time which evidently does not apply to the measurement adding request and changes everytime the measurement adding page is loaded.

it seems like using this measurement adding authenticity_token doesn't invalidate the login time authenticity_token since

resp = client.set_measurements(value=50)
print(client.get_measurements())

appears to work fine. i'm guessing any POST operation requires a separate authenticity_token taken from the respective page document's form as there are already provisions for this mechanism in get_food_search_results() as well as _login().

[Dnic94]

Thanks. Works fine for me. 👍
Merged your changes also in my fork.
Unfortunately this Repo seems not to be actively maintained :(

[bogenpirat]

given that #129 fixes a more current issue and essentially includes this PR, it supersedes this PR. thanks for the reviews!