[APP] Visma eAccounting - This is the most popular bookkeeping app/api in Scandinavia

**Name of app / service**
eAccounting

**Link to developer documentation**
https://developer.vismaonline.com/docs/overview
https://eaccountingapi.vismaonline.com/swagger/ui/index#/ApprovalV2

**Is lack of support preventing you from moving forward, or do you have a workaround?**
Not having this app prevents us from moving forward. We see the other app named e-conomic that exists in Pipedream, it is not the same app, but Visma apparently provides both these apps with similar names. The one with the most users and value is the Visma eAccounting API.

**Are there specific actions or triggers, you'd like to see for this app? Please let us know here or use the Action and Trigger issue templates to open requests for each!**
List of endpoints we want to be supported:
create_attachment
create_customer_invoice
create_supplier_invoice
create_voucher
get_account_balance_by_account_number
get_account_balances
get_attachments
get_bank_accounts
get_company_settings
get_customer_invoices
get_supplier_invoices
get_unmatched_bank_transactions
list_articles
list_customers
list_fiscalyears
list_fiscalyears_openingbalances
list_suppliers
list_vouchers