[Backend] Fix test cases part 1

[djeck1432]

🚨 Attention: Please read the guidelines before applying; otherwise, you will be ignored. 🚫📋
0. Please, join the telegram group to keep in touch https://t.me/+m0IGRiBvLtsyMzIy

1. Read guideline here
2. Write approximately time for distributing this task when you applying.
3. Fix all failed test cases:
4. Set up project and run pytest web_app/tests
5. Fix test cases for next files:

• test_dashboard
• test_positions.py

[mymiracle0118]

I’d like to resolve this. I like cherry.

[ekumamatthew]

Could I take over this issue? I like cherry. @matt_travis12

[GideonBature]

Could I try solving this?

[Birdmannn]

I like cherry, telegram handle: @lemonade46. I am Pascal, new contributor to the project. I will read the readme.md and follow the instructions there to complete this assignment. I am already in the telegram group, and I'll make sure to always keep in touch. Please I have just one contribution throughout OD so far.

[Birdmannn]

Thank you very much