Certain Walmart accounts will connect to SKULabs with no permissions. If you discover this problem, head to your API Keys section of Walmart and mirror these settings.
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If you're not able to select certain settings, try submitting with as many settings as you can, opening another API key, returning to SKULabs Key then seeing if the permissions are suddenly available. This is a bug in Walmart's systems. Otherwise, contact Walmart support to ensure you can enable the permissions above.
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It is vitally important "Reports - ViewOnly" be provided or listings sync can not be started.