Name for the Key Vault. Must begin with an ASCII alphanumeric or underscore (_) character, and must contain only ASCII alphanumeric, underscore, hash (#), period (.), space, colon (:), at sign (@), equal sign (=), and hyphen (-) characters. Can be changed after the Key Vault is created. CLI Users: If the name includes one or more spaces, enclose the name in double or single quotation marks (for example, "my keyvault" or 'my keyvault').