Moving Confidential Info into environment variables

[harshakhmk]

Related Issue or bug

• place all the confidential information in .env file

Fixes: #292

Describe the changes you've made

Moved all the confidential information into environment variables and sending mail when the email and password provided by the host is Not None thereby reducing latency on the SMTPLIB server

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, local variables)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce.

Describe if there is any unusual behaviour of your code(Write NA if there isn't)

A clear and concise description of it.

Checklist:

• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• Any dependent changes have been merged and published in downstream modules.

Screenshots

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original screenshot	updated screenshot

[swapnilsparsh]

A lot of bugs and errors, please resolve it.