error installaing extension

[rachido_7]

i got this message when i want to install extension in magento 2 

system/add new integration/ i click allow but i had this message

''Please setup or sign in into your 3rd party account to complete setup of this integration."

thanks for your help

[Dmitry_Fedyuk]

For now (while Magento 2 Marketplace is not ready yet) you should install Magento 2 extensions through the Composer.
How to install a Magento 2 extension from a Git repository: https://mage2.pro/t/25