canAppend = async (entry) => {
    const writerIdentity = await identities.getIdentity(entry.identity)
    if (!writerIdentity) {
      return false
    }
    const { id } = writerIdentity
    // Allow if the write access list contain the writer's id or is '*'
    if (write.includes(id) || write.includes('*')) {
      // Check that the identity is valid
      return await identities.verifyIdentity(writerIdentity)
    }
    return false
  }
Verifies the write permission of an entry.
@param {module:Log~Entry} entry An entry to verify.
@return {boolean} True if the entry's identity has write permission,
false otherwise.
@memberof module:AccessControllers.AccessControllers-IPFS