Can`t buy premium account 
### Description

Can`t buy premium account 

### Version


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**Kactus version:** 0.1.7

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**OS version:** osX 10.12.6 Beta (16G24b)

### Steps to Reproduce

1. [First step]
1. [Second step]
1. [and so on]

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**Expected behavior:** Want to buy premium account to use in private repo.

**Actual behavior:** Error with Stripe api

**Reproduces how often:** Every time

<img width="844" alt="screen shot 2017-07-18 at 8 58 59 pm" src="https://user-images.githubusercontent.com/10697761/28332233-c488ccda-6bfc-11e7-9fc2-7a1b72d1876f.png">

