Plugin list should install external as pip install --user

[AndresOrtegaGuerrero]

When working on the materials cloud server,
if the external plugin gets install as pip install --user , if the server is restart it doesnt find the external plugin as installed

def install_package(package_name, pip, github, output_container, message_container, install_btn, remove_btn, accordion, index):
if pip:
command = ["pip", "install", pip]
else:
command = ["pip", "install", "git+" + github]