better error handling on misconfiguration

[sakulstra]

multiple devs now used this and misconfigured .env resulting in unreasonable error messages.

We should double check if:
a) documentation is misleading
b) improve error reporting, so throw an actual error , not spam pages of promise rejected etc

[efecarranza]

Hi,

I was using the project as suggested here:

https://docs.tenderly.co/other/platform-access/how-to-find-the-project-slug-username-and-organization-name

I think it can be a bit confusing with what's expected for the project name, maybe something like this:

export TENDERLY_ACCESS_TOKEN=tenderly_access_token
export TENDERLY_PROJECT=tenderly_project # (project name only, not full URL)
export TENDERLY_ACCOUNT=tenderly_account # (username or organization name)

would make it more explicit.