Basic Authorization in Zapproxy API

Question

I have this curl to call an api:

curl -X POST -u user:password /to/the/end/point

And if i get the request with zapproxy i can send this and do an active attack, but i am trying this calling to the python api. I cant authenticate using basic authorization (base64 or user:password). I am trying creating a context with the gui and export and using it with zap-api-scan.py, but it dont work.

I have already read these post:

https://zaproxy.blogspot.com/2017/06/scanning-apis-with-zap.html

Basic Authorization in OWASP ZAP

https://github.com/zaproxy/zap-core-help/wiki/HelpStartConceptsAuthentication#httpntlm-authentication

But I have not found the solution.

Please can you help me?

Thanks.

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I have this but dont work, dont import the context:

#!/usr/bin/env python

from zapv2 import ZAPv2


target = 'https://target/to/api'

zap = ZAPv2(proxies={'http': 'http://127.0.0.1:8888', 'https': 'http://127.0.0.1:8888'})

zap.context.import_context("/file/context")

print 'Accessing target %s' % target
zap.urlopen(target)
time.sleep(2)

print 'Spidering target %s' % target
scanid = zap.spider.scan(target)

time.sleep(2)

print 'Spider completed'

time.sleep(5)

print 'Scanning target %s' % target
scanid = zap.ascan.scan(target)

print 'Scan completed'