Add claim token function

[fvictorio]

Closes #126.

[coveralls]

Pull Request Test Coverage Report for Build 415

• 6 of 6 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.1%) to 79.204%

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Totals
Change from base Build 413:	0.1%
Covered Lines:	954
Relevant Lines:	1179

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💛 - Coveralls