##### SUMMARY
`ansible-galaxy collection install` currently requires the user to specify an install path using the `-p` option. Galaxy currently generates and displays the CLI command for installing a collection. There is no way for Galaxy to determine a value for `-p`, and hard coding a default value into Galaxy makes no sense.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
`ansible-galaxy`

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```
ansible 2.10.0.dev0
  config file = /etc/ansible/ansible.cfg
  configured module search path = [u'/Users/chouseknecht/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /Users/chouseknecht/projects/ansible/lib/ansible
  executable location = /Users/chouseknecht/.pyenv/versions/venv27/bin/ansible
  python version = 2.7.14 (default, Nov 14 2017, 23:24:24) [GCC 4.2.1 Compatible Apple LLVM 9.0.0 (clang-900.0.38)]
```

data.append(format_str % (u"Name", u"Description"))
        data.append(format_str % (u"----", u"-----------"))
        for role in response['results']:
            data.append(format_str % (u'%s.%s' % (role['username'], role['name']), role['description']))
        data = u'\n'.join(data)
        self.pager(data)
        return True
    def execute_login(self):
        """
        verify user's identify via Github and retrieve an auth token from Ansible Galaxy.
        """
        
        if context.CLIARGS['token'] is None:
            if C.GALAXY_TOKEN:
                github_token = C.GALAXY_TOKEN
            else:
                login = GalaxyLogin(self.galaxy)
                github_token = login.create_github_token()
        else:
            github_token = context.CLIARGS['token']
        galaxy_response = self.api.authenticate(github_token)
        if context.CLIARGS['token'] is None and C.GALAXY_TOKEN is None:
            
            login.remove_github_token()
        
        token = GalaxyToken()
        token.set(galaxy_response['token'])
        display.display("Successfully logged into Galaxy as %s" % galaxy_response['username'])
        return 0
    def execute_import(self):