Getting it using Composer failed

[shahbaz-dev1]

I am trying to fetch it using composer. Added it in required package "raccoonsoftware/netgsm": "*", Getting the following error

` The requested package raccoonsoftware/netgsm could not be found in any version, there may be a typo in the package name.

Potential causes:

• A typo in the package name
• The package is not available in a stable-enough version according to your minimum-stability setting see https://getcomposer.org/doc/04-schema.md#minimum-stability for more details.`

[raccoonsoftware]

Please send email to info@mehmetnuri.net

[shahbaz-dev1]

Can you please post the solution here.