Zscaler-api-talkers

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1. Added the following ZIA methods (by `Sergio Pereira <mailto:spereirazscaler.com>`_)
- List admin users and roles
2. Updated readme file with docker instructions (by `Sergio Pereira <mailto:spereirazscaler.com>`_)

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1. Added the following ZIA methods (by `Sergio Pereira <mailto:spereirazscaler.com>`_)
- List, add, delete network services
- List, add, delete admin audit logs
- Added delete ipSourceGroups and ipDestinationGroups
- Added delete static IP Method
- list ipSourceGroups lite method
- added a generic update call
2. Updated install instructions
3. Added the following ZPA methods (by `Sergio Pereira <mailto:spereirazscaler.com>`_)
- list configured servers
- list_segment_group
- list_connector
- delete_bulk_connector
- list_connector_group
- list_browser_access_cert
- list_customer_version_profile
- list_cloud_connector_group
4. Updated list_idP method url to v2. (by `Sergio Pereira <mailto:spereirazscaler.com>`_)
5. Updated list_saml_attributes method url to v2 (by `Sergio Pereira <mailto:spereirazscaler.com>`_)

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1. Added the following ZIA methods (by `Sergio Pereira <mailto:spereirazscaler.com>`_)
- List, add, delete Cloud Firewall Policies
2. Updated instructions of zpa usage(by `Sergio Pereira <mailto:spereirazscaler.com>`_)
3. Added the following ZIA methods (by `Hasan Faraz <mailto:hfarazzscaler.com>`_)
- DLP Dictionaries
- List, add, delete DLP Dictionaries
4. Fixed bug for ZIA list sub locations (by `Sergio Pereira <mailto:spereirazscaler.com>`_)

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1. Updated README file (by `Sergio Pereira <mailto:spereirazscaler.com>`_)
- Updated instructions of zpa usage
- Added method to create access policy
- Added method to obtain VPN credentials in zia_talker
- Added method to add static IP address in zia_talker

2. Updated zpa_talker for SAML method (by `Rohit Luthra <mailto:rluthrazscaler.com>`_)
- Added method for SAML Attribute pull from the customer portal
- Added method for fetching the global policy Global policy ID

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1. Released Version 1.0 (by `Sergio Pereira <mailto:spereirazscaler.com>`_)
- zia_talker: Class to consume ZIA public API
- zpa_talker: Class to consume ZPA public API
- helpers
-http_calls: Class to perform HTTP calls
- Docs
-Changelog.rst: Tracks changes made
-Contributing.rst: Contribution guidelines
- requirements.txt: Repository packages dependency