What is the test for a plaintiff to sue a municipality under Section 1983 of the 1983 Local Government Act?

"Plaintiffs who seek to impose liability on local governments under 1983 must prove that action pursuant to official municipal policy caused their injury. Official municipal policy includes the decisions of a government's lawmakers, the acts of its policymaking officials, and practices so persistent and widespread as to practically have the force of law. These are action[s] for which the municipality is actually responsible." Connick v. Thompson, 563 U.S. 51, 60-61 (2011) (internal citations and quotations omitted) (alteration in original).