René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Adding a collaborator to a repo returns pygithub3.exceptions.BadRequest: 400 - Problems parsing JSON","articleBody":"I'm trying to add a collaborator to a repo with:\r\n```\r\ngh.repos.collaborators.add(\"collaborator-name\", \"name\", \"repo\")\r\n```\r\n\r\nbut I'm getting: \r\n```\r\npygithub3.exceptions.BadRequest: 400 - Problems parsing JSON\r\n```\r\n\r\nHere is the full stack:\r\n```\r\nTraceback (most recent call last):\r\n  File \"./test.py\", line 8, in \u003cmodule\u003e\r\n    collaborators = gh.repos.collaborators.add(\"collaborator-name\", \"name\", \"repo\")\r\n  File \"/Library/Python/2.7/site-packages/pygithub3/services/repos/collaborators.py\", line 40, in add\r\n    return self._put(request)\r\n  File \"/Library/Python/2.7/site-packages/pygithub3/services/base.py\", line 129, in _put\r\n    response = self._client.put(request, data=input_data, **kwargs)\r\n  File \"/Library/Python/2.7/site-packages/pygithub3/core/client.py\", line 100, in put\r\n    response = self.request('put', request, **kwargs)\r\n  File \"/Library/Python/2.7/site-packages/pygithub3/core/client.py\", line 71, in wrapper\r\n    return func(self, verb, request, **kwargs)\r\n  File \"/Library/Python/2.7/site-packages/pygithub3/core/client.py\", line 81, in request\r\n    GithubError(response).process()\r\n  File \"/Library/Python/2.7/site-packages/pygithub3/core/errors.py\", line 35, in process\r\n    raise raise_error()\r\n  File \"/Library/Python/2.7/site-packages/pygithub3/core/errors.py\", line 23, in error_400\r\n    raise BadRequest(\"400 - %s\" % self.debug.get('message'))\r\npygithub3.exceptions.BadRequest: 400 - Problems parsing JSON\r\n```\r\n\r\nI tried deleting and listing, they both work fine, but adding doesn't work. Could you please advice? Thanks.","author":{"url":"https://github.com/hhebbo","@type":"Person","name":"hhebbo"},"datePublished":"2017-08-15T14:38:01.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/64/python-github3/issues/64"}