Connect with the database for the time management data instead of using a json file

[Daniru2007]

Describe the bug
Connect with the database for the time management data instead of using a json file

Expected behavior
should use something database instead of json files
Screenshots
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Desktop (please complete the following information):

• OS: All
• Browser: All
• Version All

Smartphone (please complete the following information):

• Device: All
• OS: All
• Browser All
• Version All

Additional context